40945000 has 80 divisors (see below), whose sum is σ = 101217600. Its totient is φ = 15480000.

The previous prime is 40944949. The next prime is 40945001. The reversal of 40945000 is 54904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40945001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 94785 + ... + 95215.

It is an arithmetic number, because the mean of its divisors is an integer number (1265220).

Almost surely, 2^40945000 is an apocalyptic number.

40945000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40945000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50608800).

40945000 is an abundant number, since it is smaller than the sum of its proper divisors (60272600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40945000 is a wasteful number, since it uses less digits than its factorization.

40945000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476 (or 457 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 40945000 is about 6398.8280176920. The cubic root of 40945000 is about 344.6674664649.

Adding to 40945000 its reverse (54904), we get a palindrome (40999904).

The spelling of 40945000 in words is "forty million, nine hundred forty-five thousand".